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623: Mainline

Much of the required machinery for writing into a file runs parallel to the required machinery for reading from a file.

First, you connect to an output file by creating an instance of the FileOutputStream class, also known as a file output stream, for a specified file. The following is an example in which the file specification happens to be "output.data", and the file output stream is assigned to stream:

                            File specification --* 
                                                 v 
                                               ------------- 
FileOutputStream stream = new FileOutputStream("output.data");